CN210037863U - Compound type flue gas flow velocity measuring device - Google Patents
Compound type flue gas flow velocity measuring device Download PDFInfo
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- CN210037863U CN210037863U CN201921005675.XU CN201921005675U CN210037863U CN 210037863 U CN210037863 U CN 210037863U CN 201921005675 U CN201921005675 U CN 201921005675U CN 210037863 U CN210037863 U CN 210037863U
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Abstract
The utility model provides a composite smoke flow velocity measuring device, wherein a measuring probe is vertically inserted into the wall of a flue pipe, and the measuring probe comprises a welding flange, an S-shaped leather dragging pipe unit and a cable fixing pipe; the S-shaped skin dragging pipe unit comprises a total pressure pipe, a static pressure pipe, a thermal flowmeter and a temperature sensor, wherein the top of the total pressure pipe is bent towards the opposite direction of the flow direction of the flue gas, and the static pressure pipe is bent towards the direction of the flow direction of the flue gas; the host computer includes host system and respectively with host system electric connection's display module, wireless module, hot type detection module and differential pressure detection module, hot type detection module passes through cable and thermal type flowmeter electric connection, differential pressure detection module includes atmospheric sensor, static pressure sensor and differential pressure sensor, and static pressure sensor passes through the trachea and is connected with the static pressure pipe, and differential pressure sensor passes through the trachea and is connected with static pressure pipe and total pressure pipe respectively, has that measurement accuracy is high, stability is good, longe-lived advantage.
Description
Technical Field
The utility model belongs to the technical field of detecting instrument, concretely relates to compound survey flue gas velocity of flow device.
Background
The traditional method for measuring the flue gas flow velocity generally adopts a single principle to measure the flow velocity, and mainly comprises an S-shaped pitot tube method and a thermal method measuring principle, wherein the S-shaped pitot tube measuring principle and the thermal method measuring principle have application defects respectively; the thermal flowmeter has large measurement error even cannot be measured when the flow rate is lower than 5m/S, and the thermal flowmeter has relatively large measurement error when the flow rate is generally high, so that the thermal flowmeter is suitable for low-flow measurement and can measure 0.08m/S accurately and reliably within 0-5 m/S.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a compound survey flue gas velocity of flow device to solve S type skin pipe-dragging method and hot type flowmeter dual mode in flue gas velocity of flow detects, single mode detects the problem that the precision has the deviation between different velocity of flow intervals.
The utility model provides a following technical scheme:
a composite type device for measuring the flow velocity of flue gas comprises a flue pipe wall, a measuring probe and a host, wherein the measuring probe is vertically inserted into the flue pipe wall and comprises a welding flange, an S-shaped leather pipe dragging unit and a cable fixing pipe, the welding flange is welded on the flue pipe wall, the S-shaped leather pipe dragging unit extends to the inner side of the flue pipe wall along the welding flange, and the cable fixing pipe is arranged on the outer side of the flue pipe wall and is connected with the S-shaped leather pipe dragging unit along the inner side of the welding flange; the S-shaped skin dragging pipe unit comprises a total pressure pipe, a static pressure pipe, a thermal flowmeter and a temperature sensor, wherein the top of the total pressure pipe is bent towards the opposite direction of the flow direction of flue gas, and the static pressure pipe is bent towards the direction of the flow direction of the flue gas; the host computer include the host system and respectively with host system electric connection's display module, wireless module, hot type detection module and differential pressure detection module, hot type detection module pass through the cable with hot type flowmeter electric connection, differential pressure detection module includes atmospheric sensor, static pressure sensor and differential pressure sensor, static pressure sensor pass through the trachea with the static pressure union coupling, differential pressure sensor pass through the trachea respectively with the static pressure pipe with the total pressure union coupling.
Furthermore, an asbestos gasket is arranged on one side, close to the outer surface of the flue pipe wall, of the welding flange.
Furthermore, a locking nut is arranged between the welding flange and the cable fixing pipe.
Furthermore, the thermal flowmeter and the outer side of the temperature sensor are provided with protective sleeves.
Furthermore, the differential pressure detection module comprises a gas flow path assembly, the gas flow path assembly comprises a two-position two-way electromagnetic valve, a first two-position three-way electromagnetic valve and a second two-position three-way electromagnetic valve, an air inlet of the first two-position three-way electromagnetic valve is connected with the full-pressure pipe, and an air outlet of the first two-position three-way electromagnetic valve is respectively connected to one end of the two-position two-way electromagnetic valve and one end of the differential pressure sensor; and an air inlet hole of the second two-position three-way electromagnetic valve is connected with the static pressure pipe, and an air outlet hole of the second two-position three-way electromagnetic valve is respectively connected to the other end of the two-position two-way electromagnetic valve, the other end of the differential pressure sensor and the static pressure sensor.
Furthermore, the differential pressure detection module comprises a reverse pressure sensor and a reverse air source, the reverse air source is respectively connected with the exhaust holes of the first two-position three-way electromagnetic valve and the second two-position three-way electromagnetic valve, and the reverse pressure sensor is connected with the reverse air source.
Further, the main control module comprises a comparator, the comparator is provided with a preset flow rate value, and the comparator is used for comparing the preset flow rate value with the measurement flow rate values of the thermal detection module and the differential pressure detection module.
Furthermore, the wireless module is externally connected with a mobile terminal through the internet, and the mobile terminal comprises a mobile phone, a tablet and a computer.
The utility model has the advantages that:
the utility model relates to a composite flue gas velocity of flow device, which combines two methods of S-shaped skin pipe-dragging method and thermal flowmeter method, switches to S-shaped skin pipe-dragging method at low speed and thermal flowmeter method at high speed, ensures the measuring precision in the full range; meanwhile, two measuring devices are combined, when one of the measuring devices is damaged and fails, the other measuring device can continuously work, so that the reliability of the device is improved, and the service life of the device is prolonged; the gas flow path assembly is arranged to perform back blowing control, so that the blockage of the leather dragging pipe is prevented, and long-term reliable measurement is met.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the installation of the present invention;
FIG. 3 is a schematic view of an S-shaped skin tug unit;
FIG. 4 is a schematic view of a gas flow path assembly;
labeled as: 1. the device comprises a flue pipe wall, 2. a measuring probe, 21. a welding flange, 22. a cable fixing pipe, 23. an asbestos gasket, 24. a locking nut, 3. an S-shaped leather pipe unit, 31. a total pressure pipe, 32. a static pressure pipe, 33. a thermal flowmeter, 34. a temperature sensor, 35. a protective sleeve, 4. a host, 41. a main control module, 42. a display module, 43. a wireless module, 44. a thermal detection module, 45. a differential pressure detection module, 5. an atmospheric sensor, 51. a static pressure sensor, 52. a differential pressure sensor, 53. a reverse pressure sensor, 54. a reverse gas source, 6. a gas flow path component, 61. a two-position two-way electromagnetic valve, 62. a first two-position three-way electromagnetic valve, 63. a second two-position three-way electromagnetic valve, 7. a cable and 8.
Detailed Description
As shown in fig. 1-3, a composite flue gas flow velocity measuring device comprises a flue pipe wall 1, a measuring probe 2 and a host 4, wherein the measuring probe 2 is vertically inserted into the flue pipe wall 1, the measuring probe 2 comprises a welding flange 21, an S-shaped skin pipe unit 3 and a cable fixing pipe 22, the welding flange 21 is welded on the flue pipe wall 1, the S-shaped skin pipe unit 3 extends to the inner side of the flue pipe wall 1 along the welding flange 21, the cable fixing pipe 22 is arranged on the outer side of the flue pipe wall 1 and is connected with the S-shaped skin pipe unit 3 along the inner side of the welding flange 21; an asbestos gasket 23 is arranged on one side, close to the outer surface of the flue pipe wall 1, of the welding flange 21, a locking nut 24 is arranged between the welding flange 21 and the cable fixing pipe 22, and a protective sleeve 35 is arranged on the outer sides of the thermal flowmeter 33 and the temperature sensor 34;
the S-shaped skin dragging pipe unit 3 comprises a total pressure pipe 31, a static pressure pipe 32, a thermal flowmeter 33 and a temperature sensor 34, wherein the top of the total pressure pipe 31 is bent towards the opposite direction of the flow direction of the flue gas, and the static pressure pipe 32 is bent towards the direction of the flow direction of the flue gas; the host 4 comprises a main control module 41, and a display module 42, a wireless module 43, a thermal detection module 44 and a differential pressure detection module 45 which are respectively electrically connected with the main control module 41, wherein the thermal detection module 44 is electrically connected with a thermal flowmeter 33 through a cable 7, the differential pressure detection module 45 comprises an atmospheric sensor 5, a static pressure sensor 51 and a differential pressure sensor 52, the static pressure sensor 51 is connected with a static pressure pipe 32 through an air pipe 8, and the differential pressure sensor 52 is respectively connected with the static pressure pipe 32 and a full pressure pipe 31 through the air pipe 8; the main control module 41 comprises a comparator, the comparator is provided with a preset flow rate value, the comparator is used for comparing the preset flow rate value with the measurement flow rate values of the thermal detection module 44 and the differential pressure detection module 45, the wireless module is externally connected with the mobile terminal through the internet, and the mobile terminal comprises a mobile phone, a tablet and a computer.
As shown in fig. 4, the differential pressure detection module 45 includes a gas flow path assembly 6, the gas flow path assembly 6 includes a two-position two-way solenoid valve 61, a first two-position three-way solenoid valve 62 and a second two-position three-way solenoid valve 63, an air inlet of the first two-position three-way solenoid valve 62 is connected to the full pressure pipe 31, and an air outlet of the first two-position three-way solenoid valve 62 is connected to one end of the two-position two-way solenoid valve 61 and one end of the differential; an air inlet hole of the second two-position three-way solenoid valve 63 is connected with the static pressure pipe 32, an air outlet hole of the second two-position three-way solenoid valve 63 is respectively connected to the other end of the two-position two-way solenoid valve 61, the other end of the differential pressure sensor 52 and the static pressure sensor 51, the differential pressure detection module 45 comprises a reverse pressure sensor 53 and a reverse air source 54, the reverse air source 54 is respectively connected with exhaust holes of the first two-position three-way solenoid valve 62 and the second two-position three-way solenoid valve 63, and the reverse.
The working mode of the specific embodiment is as follows:
the main control module 41 is relatively strong and preset with a flow rate value of 5m/S, when the detected flow rate is less than 5m/S, an S-shaped skin-pipe method is adopted, the atmospheric pressure, the smoke static pressure, the smoke temperature and the smoke dynamic pressure are obtained through a differential pressure detection module 45, a table is looked up to obtain a pitot tube correction coefficient and the smoke molar mass, and the smoke flow rate at the moment is calculated according to an S-shaped skin-pipe method formula;
vs-flue gas flow rate, m/s; rhosFlue gas density, kg/m3；Ba-atmospheric pressure, Pa; kp-a skin tug correction factor; t is ts-flue gas temperature, deg.c; ps-flue gas static pressure, Pa; pd-dynamic pressure of flue gas, Pa; msFlue gas molar mass, kg/kmol.
When the detected flow velocity is higher than 5m/s, directly acquiring the flow velocity by adopting a thermal detection module 44 and a thermal flowmeter 33; the air path flow path assembly 6 is a valve group, can regularly carry out back flushing control on the S-shaped leather pipe-dragging unit 3, prevents the leather pipe-dragging unit from being blocked, and meets the requirement of long-term reliable measurement.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A composite type device for measuring the flow velocity of flue gas comprises a flue pipe wall, a measuring probe and a host machine, and is characterized in that the measuring probe is vertically inserted into the flue pipe wall and comprises a welding flange, an S-shaped skin dragging pipe unit and a cable fixing pipe, wherein the welding flange is welded on the flue pipe wall, the S-shaped skin dragging pipe unit extends to the inner side of the flue pipe wall along the welding flange, and the cable fixing pipe is arranged on the outer side of the flue pipe wall and is connected with the S-shaped skin dragging pipe unit along the inner side of the welding flange; the S-shaped skin dragging pipe unit comprises a total pressure pipe, a static pressure pipe, a thermal flowmeter and a temperature sensor, wherein the top of the total pressure pipe is bent towards the opposite direction of the flow direction of flue gas, and the static pressure pipe is bent towards the direction of the flow direction of the flue gas; the host computer include the host system and respectively with host system electric connection's display module, wireless module, hot type detection module and differential pressure detection module, hot type detection module pass through the cable with hot type flowmeter electric connection, differential pressure detection module includes atmospheric sensor, static pressure sensor and differential pressure sensor, static pressure sensor pass through the trachea with the static pressure union coupling, differential pressure sensor pass through the trachea respectively with the static pressure pipe with the total pressure union coupling.
2. A composite flue gas flow velocity measuring device according to claim 1, wherein an asbestos gasket is provided on the welding flange on the side close to the outer surface of the flue pipe wall.
3. A composite flue gas flow velocity measuring device according to claim 1, wherein a lock nut is provided between the welding flange and the cable fixing tube.
4. A composite flue gas flow velocity measuring device according to claim 1, wherein a protective sleeve is provided outside the thermal flow meter and the temperature sensor.
5. The composite flue gas flow velocity measuring device according to claim 1, wherein the differential pressure detection module comprises a gas flow path assembly, the gas flow path assembly comprises a two-position two-way solenoid valve, a first two-position three-way solenoid valve and a second two-position three-way solenoid valve, an air inlet of the first two-position three-way solenoid valve is connected with the total pressure pipe, and an air outlet of the first two-position three-way solenoid valve is respectively connected to one end of the two-position two-way solenoid valve and one end of the differential pressure sensor; and an air inlet hole of the second two-position three-way electromagnetic valve is connected with the static pressure pipe, and an air outlet hole of the second two-position three-way electromagnetic valve is respectively connected to the other end of the two-position two-way electromagnetic valve, the other end of the differential pressure sensor and the static pressure sensor.
6. The composite flue gas flow velocity measuring device according to claim 5, wherein the differential pressure detection module comprises a reverse pressure sensor and a reverse gas source, the reverse gas source is respectively connected with the exhaust holes of the first two-position three-way solenoid valve and the second two-position three-way solenoid valve, and the reverse pressure sensor is connected with the reverse gas source.
7. A combined flue gas flow velocity measurement device according to claim 1, wherein the main control module comprises a comparator, the comparator is provided with a preset flow velocity value, and the comparator is used for comparing the preset flow velocity value with the measurement flow velocity values of the thermal detection module and the differential pressure detection module.
8. A composite flue gas flow velocity measuring device according to claim 1, wherein the wireless module is externally connected with a mobile terminal through the internet, and the mobile terminal comprises a mobile phone, a tablet and a computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921005675.XU CN210037863U (en) | 2019-06-28 | 2019-06-28 | Compound type flue gas flow velocity measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921005675.XU CN210037863U (en) | 2019-06-28 | 2019-06-28 | Compound type flue gas flow velocity measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210037863U true CN210037863U (en) | 2020-02-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921005675.XU Active CN210037863U (en) | 2019-06-28 | 2019-06-28 | Compound type flue gas flow velocity measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210037863U (en) |
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2019
- 2019-06-28 CN CN201921005675.XU patent/CN210037863U/en active Active
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